Stasis field

One specific type of stasis device kept its occupant's mind awake, but their body was trapped and remained inactive. While their body held in stasis, they apparently did not require sustenance to survive. It is unknown if they would still die from old age, though this seems unlikely. All starships capable of hyperspace travel used stasis fields to protect the crew from the possible effects of traveling faster than the speed of light.

Only Jedi were capable of controlling this type of stasis fields. The only recorded use of this device was when six members of the Jedi High Council trapped Dark JediVolfe Karkko in one. Karkko was incarcerated for a millennium before persuading Aayla Secura to set him free.

Dread LordDarth Krayt claimed to have been in stasis at some point in his life (though there is no way to determine if he did so once, or more than once, or how long that stasis was maintained), even though he also claimed to have perfected techniques used for prolonging life. He managed however to preserve his physical form well beyond his normal lifespan, but not without consequences.

Boba Fett was also "rumored" to have used a stasis field in extreme circumstances, though he, as is well known, preferred "disintegrations."